* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "微软雅黑", Arial, sans-serif;
}
body {
    width: 100vw;
    height: 100vh;
    background: linear-gradient(#1E3A8A, #3B82F6);
    overflow: hidden;
}
#snow-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}
.gift-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
}
.modal-content {
    background: white;
    padding: 30px 20px;
    border-radius: 15px;
    width: 80%;
    max-width: 400px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
}
.modal-content h2 {
    color: #1E3A8A;
    margin-bottom: 15px;
    font-size: 22px;
}
.modal-content p {
    color: #666;
    margin-bottom: 25px;
    font-size: 16px;
}
.btn-group {
    display: flex;
    gap: 15px;
    justify-content: center;
}
.btn-group button {
    padding: 10px 25px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s;
}
#openBtn {
    background: #3B82F6;
    color: white;
}
#cancelBtn {
    background: #eee;
    color: #666;
}
.btn-group button:hover {
    transform: scale(1.05);
}
.surprise-modal {
    position: fixed;
    background: white;
    padding: 20px 15px;
    border-radius: 10px;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.2);
    z-index: 101;
    animation: pop 0.5s ease;
}
@keyframes pop {
    0% { transform: scale(0); }
    80% { transform: scale(1.1); }
    100% { transform: scale(1); }
}
